The genotype is the genetic makeup a sativa seed carries, while the phenotype is what that plant becomes under the specific conditions it is grown in. Two seeds with nearly identical genetics can look quite different in a hot tent versus a cool greenhouse, and the same cut grown in two locations may seem like different strains. The basics page on https://hazesativaseeds.com uses this to explain why grow reports on the same line disagree so often and why a keeper needs to be evaluated in your own environment. Blaming the seeds for a difference the grow room caused is a common mistake.